Showing popularity through time with stack
D3's official docs say:
"The stack layout takes a two-dimensional array of data and computes a baseline; the baseline is then propagated to the above layers, so as to produce a stacked graph."
Not clear at all, but I am hard pressed to come up with anything better. The stack layout calculates where one layer ends and another begins. An example should help.
We're going to make a layered timeline of donations over the 5-year sample, stretching as far back as 2010, with the width of each layer telling us how many donations went where at a certain time. This timeline is called a streamgraph.
To label layers, we're going to create a mouseover behavior that highlights a layer and shows a tooltip with the donation ...
Get Data Visualization: Representing Information on Modern Web now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
